The money story inside Fable 5.1 is almost as big as the benchmark story. Anthropic cut cache-read pricing to $0.25 per million tokens — 75% less than Fable 5 — and estimates typical workloads run about 25% cheaper, with highly agentic jobs saving up to roughly 45%. That change is why some early-access partners say a Fable-class model is finally economical for work they had kept on Opus.
Alongside price, Anthropic launched Enterprise Frontier Safeguards (EFS): a design that aims for zero-data-retention-style privacy while still letting automated misuse detection run across time. Customer activity data can live in the customer’s own cloud under their keys; review signals go back to the customer rather than defaulting to Anthropic staff reading regulated logs. TechCrunch frames the release as both cheaper and less choke-prone on false-positive restrictions — a direct answer to enterprise pushback after Fable 5’s 30-day retention rules.
Source: https://www.anthropic.com/news/enterprise-frontier-safeguards